package com.zhj.test.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * 这里TextWebSocketFrame 类型，表示一个文本帧（frame）
 * @author zhj
 */
public class WebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器接收消息：" + msg.text());
        // 回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器响应时间：" + LocalDateTime.now() + msg.text()));
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        // id 表示唯一的一个值
        System.out.println("handler added 被调用 " + ctx.channel().id().asLongText());
        System.out.println("handler added 被调用 " + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handler removed 被调用 " + ctx.channel().id().asLongText());
        System.out.println("handler removed 被调用 " + ctx.channel().id().asShortText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("异常发生 " + cause.getMessage());
        ctx.close();
    }
}
